Signaling device



Sept. 18, 1928. 1,684,906

F. W. BILLIG S IGNALING DEVICE Filed June 16, 1925 I/VV NTOR ii J aTTORZcys Patented Sept. 18, 19 28.

UNITED. STATES v 1,684,906 PATENT OFF-ICE,

rnnnw. ammo, or .m'cxson, MICHIGAN, ASSIGNOB at run sranxs-wrrnmerorCOMPANY, or ucxson, mcmem, a conrom'non or x10.

' 1 SIGNALING DEVICE.

Application filed June 16, 1925. Serial No. 87,458.

This invention relates to a certain new-and improved signaling device,and more particularly to a signaling device or horn of themagnetically-actuated type.

The main object of the invention s the production of an efiicientsignaling device of substantial construction, and of economicmanufacture and arrangement, and which will produce a signal ofthe'desired character,

m pitch and amplitude.

Other objects and advantagesrelate to the details of the structure-andthe form, position, arrangement and association of the parts .thereofallfas will more fully appear from thefollowing description, taken inconnection withthe accompanying drawings, in which Figure' 1 is anelevation of a horn of this invention. j

' Figure 2'is a section taken on line 2+2,

Figure 1. I 1

.The str uctureof signaling device here illustratedis of themagnetically operated diaphragm type, and as shown, comprises a rear diahragm case-section 1- having its centra portion dished and ofsubstantially cylindrical cup-shape, and formed at its central portionwith an opening for the reception of the magnet or magnetic field --2-.p The diaphragm 3--is clamped between the rear no diaphragm casesection, and a ring or washer 6-- interposed between the front diaphragmcase section -4 and the edge of the diaphragm, bolts 5 being providedfor clamping the case sections, the washer and the diaphragm to ether.

The front diap ragm case-section 4- carries a suitable projector 95. Themagnet --2- may be secured to the diaphragm case section in any suitablemanner not herein w necessary to illustrate or describe, and asillustrated, the magnet is formed with a continuous channel or groove-12- which surrounds the central passageway and is adapted to receive afield coil -13-. This field coil lies wholly forward of the rear surfaceof the magnet 2 in the assembled structure so that the armature 19 inthe operation of the structure will contact directly with the rearsurface of the magnet 12.

The diaphragm '3 as here illustrated, is provided with a central openingsurrounded by a reinforcing internally threaded ring or collar 14permanently and rigidly secured in any suitable manner to the edge ofthe diaphragm bordering the central opening.

separated from the ring 16 'by means of washer '-18-.' =IB0lt----17--extends entirely spherically shaped so as to seat tig ,A sleeve -15- isprovided with an externally threaded ortion for co-action with theinternally t readed collar --14 which constitutes a rigid portion of thediaphragm and one end of the sleeve projects forwardly from on thediaphragm and may flatted upon diametrically opposite sides for thereception of a washer or ring -16 whichhas a noncircula-r openingadapted to fit the end of the sleeve 15 so that the ring can be -used torotate the sleeve, and the rim' is. secured in position uponthe end ofthev leave by means of a headed bolt-'.l7 and is clamped against thebushing .--14+ at .thecenter of the-adia phragm, the head of the boltbeing preferably through the sleeve 15- and projects from the rear:portion thereof, andpa'sses through the armature -19, washer +20 leaf 7o.spring' 21,- and is threaded into the substantiallylfiat base ,22' ofthe yoke --23 which rests upon the outer surface of the spring --21-.-

For the purpose of effecting a rigid and tight engagement betweenthediaphragm -3-, disk 16', sleeve '15, bolt 17--, armature 19-, washer20-, spring '21-, and yoke 23' -the rear end of sleeve -15 is somewhatenlar ed and.

htly in a substantiallysimilarly spherically shaped recess in theadjacent side of the armature 19--, andthe opposite side of the armatureis formed with a fiat recess of circular form for the reception ofwasher 20-.

Washer 26 is provided with a substantially spherical seat for contactwith the rear curved or. spherical portion of the washer 20, such washer26 being interposed between the spring --2land the washer -20 and havingrecesses for the reception of the lugs -24 formed on the flat base -22-of the yoke 23, and which lugs extend through similarly shaped recessesin the spring 2l, but do not contact with the rear spherical surface ofwasher-20.

The main feature of this invention resides in the form and constructionof the yoke 23-. This yoke is formed of a single piece of sheet metal,as for instance brass, and has its base 22' formed with a centralinternally threaded opening for the reception of the rear end of bolt 17and also with the lugs -24 projecting from the bottom of the base. An uright 80rises mm the base -22 an has an arm 81 bent at substantiallyright angles so as to lie parallel with but spaced from the base 22,

.and is formed with an internally threaded opening aligned with the bolt-17-v which opening is adapted to receive an ad ustable screw 41 adaptedto be locked in any position of adjustment by means of nut 82. Theadjustable screw -41- carried by the oke 23-; acts to operate the make'and hreak 'mecha nism for the circuits of the horn, and to effect thispurpose a built-up edestal is provided at the rear of andjcarr e by thediaphragm case-section 1- and this pedestal 83 carries the contactswhichare intermittently separated and brought to ether as hereinafterdescribed. This pedesta may consist of anumber of separate parts securedtogether and to the case section by means of ,one or more bolts, 57, andthe pedestal includes a rigid bar -34-, one end of which is mounted uponthe bolts 5T- and rigidly secured in the pedestal, and the other end ofwhichprojects inwardly from the pedestal towardthe yoke 23 and carriesan adjust.- able contact member38-, which is adapted to intermittently.contact with a second contact member -37 carried by. a spring-arm 32which in like manner hasone of its ends mounted inthe pedestal 83.. Thebar -34- and the s ring-arm 32- are insulated from each ot er in thepedestal in any suitable and well-known manner. The flexible arm 32extends beyond the contact -37 and into the space between the base22eand the overlying arm 81 of the yoke, and is provided at its end witha cu -shape member 39-- containing any suita is hard, insulatin contactmaterial for contact with t e adjustable screw -41 carried by the yoke-.23-.

It will be obvious that as this yoke 23- moves back and forth with thearmature,the adjacent screw will act to separate the contacts 37 and-38, and then permit their engagement. The yoke 23 as shown, has a rib-84- centrally disposed of the upright -80 and extending upwardly aroundthe bend into the arm 81- to provide the necessary rigidity for thisportion of the yoke, Q 7 I The horn so far described constitutes initself a useful article of manufacture, but for the pur se of providingimproved results of a su stantial nature, the bolt 17 is formed with anextension 85 which may be formed with or secured to the bolt in ansuitable manner, and for the purpose of i lustration, the forward frontrtion of the bolt-- 17-- is formed with a t readed recess adapted ,toreceive the threaded end of the extension member -85- so that the two Vpartsare rigidly and firmly secured together and constitute in effect aunitary bolt orrod. The forward end of the extension rod 85- terminatesforward of and outside of the projector 8 and is as shown reduced andexternallythreaded, and extends through the central portion of a sprinbar -86, which has its opposite ends rigi ly secured to dia metricallyopposedportions of the forward end of the projector 95-, as forinstance, by screws 87 as shown, altho; any other suitable means ofattachment may be utilized. This spring-bar may as shown be corrugatedfor the purpose of giving additional strength.

Washers 88 and 89 are mounted on the rev duced threaded end of bolt uponopposite sides of the sprin -bar 86 and a disk 90 is monntedon the ro 85forward of thewasher 89 and is secured in position thereon in anysuitable manner, as by nut 91, washer 92 being interposed between thenut and the disk. The isk, or vibratory body 90 is preferably of an areaslightl less than the area of the ,forwardend of t e projector, and iswholly outside the projector, and is preferabl formed of bell metal orsimilar material, an I have discovered that a disk of suitable size andformed of a suitable material when disposed wholly forward of theprojector and connected to the armature 19 for direct actuation thereby,produces a newand highly elficient result particularly of the carryingpower in the resultant note of the horn.

" Obviously the disk 90 may be connected to the armature 19 in variouswaysfor actuation thereby, and maybe suriported in many and varlousways,and altho have shown and described a specific structure as illustrativeof anembodiment of the invention, I .do not desire to restrict myself tothe-details of the structure, as various changes and modifications mabemade within the scope of the ap ded claims. a

it? 1. orn comprising a dia'phra a rejector extending forwardly from the iiaphragin, a vibratory disk disposed outside the projector, andmeans for simultaneously the diaphragm and said vibratory 2. A hornstructure com rising a diaphragm, a pro ector exten ing forwardlyfromthe' diaphragm, a free edge vibratory member approaching incross-sectional area the cross-sectional area of the front open end ofthe rojectorand disposed outside of and forwar lg of the projector, andmeans connecting t e said vi ratory member to the diaphragm forsimultaneous bodily movement therewith.

In witness whereof I have hereunto set my hand this 29th day of May,1925. t

- FRED W. BILLIG.

